Buggy code:
public static final PrintStream err = System . err ; public static final PrintStream out = System . out ; private static final DelegatingOutputStream delegatingErr ; private static final DelegatingOutputStream delegatingOut ; public static final boolean DEFAULT_VERBOSE = AjcTestCase . getBoolean ( "org.aspectj.tools.ajc.AjcTestCase.verbose" , true ) ; public static final boolean DEFAULT_ERR_VERBOSE = AjcTestCase . getBoolean ( "org.aspectj.tools.ajc.AjcTestCase.verbose.err" , AjcTestCase . DEFAULT_VERBOSE ) ; public static final boolean DEFAULT_OUT_VERBOSE = AjcTestCase . getBoolean ( "org.aspectj.tools.ajc.AjcTestCase.verbose.out" , AjcTestCase . DEFAULT_VERBOSE ) ; public static class Message { private int line = - 1 ; private String text ; private String sourceFileName ; private ISourceLocation [ ] seeAlsos ; public Message ( int line ) { } public Message ( int line , String text ) { } public Message ( int line , String srcFile , String text , ISourceLocation [ ] seeAlso ) { } public Message ( String text ) { } public boolean matches ( IMessage message ) { } private boolean hasAMatch ( List srcLocations , ISourceLocation sLoc ) { } public String toString ( ) { } } public static class MessageSpec { public static final AjcTestCase . MessageSpec EMPTY_MESSAGE_SET = new AjcTestCase . MessageSpec ( null , Collections . EMPTY_LIST , Collections . EMPTY_LIST , Collections . EMPTY_LIST , Collections . EMPTY_LIST ) ; boolean ignoreInfos = true ; public List fails ; public List infos ; public List warnings ; public List errors ; public List weaves ; public void setInfoComparison ( boolean enabled ) { } public boolean isIgnoringInfoMessages ( ) { } public MessageSpec ( List infos , List warnings , List errors , List fails , List weaves ) { } public MessageSpec ( List infos , List warnings , List errors ) { } public MessageSpec ( List warnings , List errors ) { } } public static class EmptyMessageSpec extends AjcTestCase . MessageSpec { public EmptyMessageSpec ( ) { } } public static class RunResult { private String command ; private String stdOut ; private String stdErr ; protected RunResult ( String command , String stdOut , String stdErr ) { } public String getCommand ( ) { } public String getStdOut ( ) { } public String getStdErr ( ) { } public String toString ( ) { } } public void assertNoMessages ( CompilationResult result ) { } public void assertNoMessages ( CompilationResult result , String message ) { } public void assertMessages ( CompilationResult result , AjcTestCase . MessageSpec expected ) { } public void assertMessages ( CompilationResult result , String message , AjcTestCase . MessageSpec expected ) { } protected List newMessageList ( AjcTestCase . Message m1 ) { } protected List newMessageList ( AjcTestCase . Message m1 , AjcTestCase . Message m2 ) { } protected List newMessageList ( AjcTestCase . Message m1 , AjcTestCase . Message m2 , AjcTestCase . Message m3 ) { } protected List newMessageList ( AjcTestCase . Message [ ] messages ) { } public CompilationResult ajc ( File baseDir , String [ ] args ) { } public File getSandboxDirectory ( ) { } public void setShouldEmptySandbox ( boolean empty ) { } public AjcTestCase . RunResult getLastRunResult ( ) { } public void testNothingForAntJUnit ( ) { } public AjcTestCase . RunResult run ( String className ) { } public AjcTestCase . RunResult run ( String className , String [ ] args , String classpath ) { } public AjcTestCase . RunResult run ( String className , String [ ] args , final String classpath , boolean useLTW ) { } private URLClassLoader createWeavingClassLoader ( URL [ ] urls , ClassLoader parent ) { URLClassLoader loader = null ; try { Class loaderClazz = Class . forName ( "org.aspectj.weaver.loadtime.WeavingURLClassLoader" , false , parent ) ; Class [ ] parameterTypes = new Class [ ] { urls . getClass ( ) , ClassLoader . class } ; Object [ ] parameters = new Object [ ] { urls , parent } ; Constructor constructor = loaderClazz . getConstructor ( parameterTypes ) ; loader = ( ( URLClassLoader ) ( constructor . newInstance ( parameters ) ) ) ; } catch ( InvocationTargetException ex ) { ex . printStackTrace ( ) ; <START_BUG> fail ( ( "Cannot<seq2seq4repair_space>create<seq2seq4repair_space>weaving<seq2seq4repair_space>class<seq2seq4repair_space>loader:<seq2seq4repair_space>" + ( ex . getCause ( ) ) ) ) ; <END_BUG> } catch ( Exception ex ) { ex . printStackTrace ( ) ; fail ( ( "Cannot<seq2seq4repair_space>create<seq2seq4repair_space>weaving<seq2seq4repair_space>class<seq2seq4repair_space>loader:<seq2seq4repair_space>" + ( ex . toString ( ) ) ) ) ; } return loader ; } private URL [ ] getURLs ( String classpath ) { } private String substituteSandbox ( String classpath ) { } protected String [ ] fixupArgs ( String [ ] args ) { } private String adaptToPlatform ( String s ) { } private List copyAll ( List in ) { } private void compare ( List expected , List actual , List missingElements , List extraElements ) { } private void addMissing ( StringBuffer buff , String type , List messages ) { } private void addExtra ( StringBuffer buff , String type , List messages ) { } private void getAnyJars ( File dir , StringBuffer buff ) { } private static void startCapture ( OutputStream errOS , OutputStream outOS ) { } private static void stopCapture ( OutputStream errOS , OutputStream outOS ) { } private static boolean getBoolean ( String name , boolean def ) { } protected void setUp ( ) throws Exception { } protected void tearDown ( ) throws Exception { } }

Fix:
fail ( ( "Cannot<seq2seq4repair_space>create<seq2seq4repair_space>weaving<seq2seq4repair_space>class<seq2seq4repair_space>loader:<seq2seq4repair_space>" + ( ex . getTargetException ( ) ) ) ) ;